Malicious PDF — malware analysis report

Static analysis result for SHA-256 067a18ec37c84a13…

MALICIOUS

PDF

77.8 KB Created: 2021-08-20 11:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0d0cdd524450d463e48c097e18cae5be SHA-1: 6b57fd615a9d6ba882c571cb79e12390069ff6cb SHA-256: 067a18ec37c84a139b641340ff39f399e54a9664fc2ea305cb93497bd1f866a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, including compromised WordPress uploads. The embedded URLs suggest an attempt to lead users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f08825e78---62633897843.pdf In PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/kolerofebe.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58229016283.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/puretufirosis.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a4aa484b458f1ac0aa3cc12af38cddf0/22750276136.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/30773233348.pdfIn PDF document text
    • http://bulmarconsult.com/files/51128755767.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/540501f02c154140b66a6d2b5bc7c00b/71896915719.pdfIn PDF document text
    • http://planetamama.ru/files/file/gebenitunefowifojib.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/6c462ba2d3f0a84582a31d3041569a8e/54956698885.pdfIn PDF document text
    • http://chromatographvials.com/d/files/95979068278.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31b7967962---1591578809.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/nazukafasimovutajemix.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/birunetubirarewefazaz.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/menopufuvafuwan.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/22863412642.pdfIn PDF document text
    • https://orsolyajuhasz.com/ckfinder/userfiles/files/22465703620.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/72269408267.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/96a8e4ca2198cf7f0c2d39d319a6a694/53081302816.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f5dc6152c0e---44805516109.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/ea84e5f017d608d4cbadb76ad3e3adda/nematituzurajomavow.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/15960795138.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/da0106125f102be5731b41e7756f651b/rovebevut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+pair+zivigo+earbudsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 17292 bytes
SHA-256: 6d6fec1309fc51780fab9b980e24efee710ded5e022885a2e10d424fd5dae08f
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 10860 bytes
SHA-256: 7e23004deb08244b85f7ba153cacefef24ddcc994c8d36f92a78e7a2a1f6d9f8

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